diff --git a/src/gui/dbman.py b/src/gui/dbman.py
index 1a941006b..8633779f3 100644
--- a/src/gui/dbman.py
+++ b/src/gui/dbman.py
@@ -45,7 +45,8 @@ from gen.ggettext import gettext as _
 import logging
 LOG = logging.getLogger(".DbManager")
 
-if os.sys.platform == "win32":
+import constfunc
+if constfunc.win():
     _RCS_FOUND = os.system("rcs -V >nul 2>nul") == 0
     if _RCS_FOUND and "TZ" not in os.environ:
         # RCS requires the "TZ" variable be set.
@@ -77,6 +78,7 @@ from glade import Glade
 from gen.db.backup import restore
 from gen.db.exceptions import DbException
 
+
 _RETURN = gtk.gdk.keyval_from_name("Return")
 _KP_ENTER = gtk.gdk.keyval_from_name("KP_Enter")
 
diff --git a/src/gui/utils.py b/src/gui/utils.py
index ea043e759..c932e7cb9 100644
--- a/src/gui/utils.py
+++ b/src/gui/utils.py
@@ -48,6 +48,7 @@ from gen.ggettext import gettext as _
 #-------------------------------------------------------------------------
 import gen.lib
 import Errors
+import constfunc
 
 #-------------------------------------------------------------------------
 #
@@ -255,13 +256,13 @@ def open_file_with_default_application( file_path ):
         ErrorDialog(_("Error Opening File"), _("File does not exist"))
         return
         
-    if os.sys.platform == 'win32':
+    if constfunc.win():
         try:
             os.startfile(norm_path)
         except WindowsError, msg:
             ErrorDialog(_("Error Opening File"), str(msg))
     else:
-        if os.sys.platform == 'darwin':
+        if constfunc.mac():
             utility = 'open'
         else:
             utility = 'xdg-open'